Cleaner for buckets of excavating-machines.



N0: 852,789 PATENTED MAY 7, 1907. 0. c. 'JAO0B S.,

CLEANER FOR BUGKETS- OPEXGAVATING MAGHINBS.

APPLIDATION FILED MAR-10, 1906.

2 SHEETS-SHEET 1.

PATENTED MAY 7, 1907.

a. 0. JACOBS? CLEANER FOR BUGKETS OF EXEAVA'I'ING MACHINES.

APPLICATION FILED MAR. 10, 1906.

'2 SHEETSSHEET 2.

EEM a.

\ UNITED STArIgi P TENT OFFICE CHARLES c. JAcoBsoF AMBOY, ILLINOIS, ASSIGNOR TO F. 'c-. AUSTIN DRAINAGE EXCAVATOR COMPANY, or CHICAGO, ILLINOIS, A coa- PORATION OF ILLINOIS.

CLEANER FOR BUCKETS EXCAVATING- MACHINE S.

Specification of Letters Patent.

.l atented May 7, 1907.

"Application filed March 10,1906. Serial No. 305,294,

IO chines of thattype wherein self-dumping scoops or buckets are employed; and has reference more particularly ,to a means for insurin the complete discharge of the contents 0 the bucket at its intended point of 1'; delivery.

a It has been found in practice that, when operating upon certain kinds of soil, such as sticky clay, the inversion of the bucket above the intended point of, delivery is insufiicient go to effect the complete discharge of the con tents some of which tend to adhere to: the bottom and rear walls oi the bucket. remedy this I have provided, in association -'with that part of the machine which effectsor permits the inversion of the bucket, av

scraper device'which automatically engages ottom wall of the bucket as the latter the reaches the. point of"dischar eand, as the 5 bucket is'inverted inthe disc arging opera- 0 tion, scrapes the bottom and rear will thereof to an extent sufficient to detach and break up any sticky portions of the load and insure their delivery. 1 My invention is applicable 'to'any excavating machine ern loying a reciproc'atory scoop andeifectingtlie discharge of the, load va "partial or complete inversion of the ap er the end. of its. travel; but for con-i venience of illustration 1- have shown my 'iIH- 4c provements as'a-pplied to and embodied in a machine-such, as isshown in Reissue Letters Patent No. 12,441, granted to me January In the accompanying drawings, which illustrate the preferred mechanicaLembodiment of the invention,-Figure '1 is a side elevationalview of the end portion of a bucket support. and guide, showing the g bucket-inverting-device and my improved 5o cleaning device applied thereto and in the operation ,of scraping therear and bottomwall i of the'bucket'; Fig.2 is an outerend of:

- Fig. 1 Fig. 3 isatop plan view The top of the bucket is opened, as clearly and-passes over a guide-sheave 17 at the end winding drum (not shown).

out, of the bucket guidingand supporting track; Fig. 4 is a longitudinal sectional view 5 5 of Fig. 1, showing the bucket partly in side elevation and just engaging the scraper or cleaner in the discharging operation; and

Fig. 5 is a cross-sectional view through the bucket-supporting track, illustrating the gen 6:: eral-form and construction thereof.

Referring to the. drawings, 6 desi nates each of a pair of parallel channel-s aped tracks, in which travel the wheels of a truck 7, in and between the side-frame members of 5 which is pivotally mounted at- 8 an openfaced bucket or scoop 9 having a lower forward cutting edge 10, and a rounded or concaveabottom and'rear wall indicated at- 11;

shown in. ig. 2. s Secured to and depending from the; enr' portion of the track is abucketdnverting am discharging device comprising substantially. a pair of L shaped frames 12 secured to the track members 6, respectively. Each of these frames has substantially horizontal and.

vertical track-ways, 13 and 14, respectively, which correspondv to' the track-ways of the main'track Thelower supporting rails of the tracks themselves] are, notched at 15, which notches coincide with the" inner ends of thehorizontal track-ways 1 3 of the discharging device, as clearly shown. in Fig. 4. The forward wheels of the truck are of a wldth' to drop. through the notches 15, while the rear wheels [are ofwider tread and willride over said notches. An operating cable 16 is attached at or near the outer end of the scoop 9 of the track, being led thence to a suitable From the fore going construction it'will be seen that as the loaded bucket is drawn up the inclined track,

when it reaches the point at which the -forward wheels are over the notches 15, said .charged,-accordin upon tends to .a ere wheels will drop therethrough and run upon the horizontal track-way 13 of the inverting device, the rear wheelsbeing pulled upwardly. past the notches, tllllSbfiIl ing: the bucket and truck to the position in icated infFi'g'.;4, wherein the bucket 'partiailyginverted, and the load partially, o

wholly,' dismaterial *operatedr' walls bucket or flows freely tiif Referring now more particularly to the.

feature ordevice which constitutesthe principal element of the present invention, .18,

designates a pair of cross-bars secured to and I between the frame members of the dischargblade 20. Thelower edge of this scraperblade is solocated relatively to the path of l the bottom of the scoop during the discharg- 3 ing operation that it engages the rear edge of the concave rear and bottom wall of the scoop during theinverting operation, in the manner clearly shown in Fig. 4; and, as the in the manner clearly indicated in Fig. 1, the

scoop is drawn still farther upwardly and outwardly, scrapes over said wall of the scoop scoop being drawn nearer to a vertical in- I verted position, and the forward wheels of the truck, which arethen the lowermost wheels, being guided and confined by the vertical track-ways-l i. I

From the foregoing it will be seen that the action of the cleaner is to engage the load virtually at its upper end, and scrape such portions thereof as tend-to adhere to the bottom wall of the scoop downwardly and out through the lowmopen end of the scoop, the discharging action of the scoop thus being in the same direction in which the material tends to fall by gravity. The bucket having been fully discharged, the cable 16 is slackened and paid out in the opposite direction,

and the upper or rear end of the truck descends, and the truck and bucket are drawn t back by a suitable returning cable not essen tial to the present invention and not herein shown.

I claim: 1

I I 1. The combinatnm with a bucket guiding and supporting track, a bucketadapted to travel thereon, and a device for ei'lecting the inversion of the loaded bucket at a point on said track, of a stationary cleaner ada ted to scrape over the bottom wall of'said )ucket during the inverting operat on, substantially as described,

2. The combination with a bucket guidingand supporting track a bucket mounted to travel thereon, and a device for effecting the inversion of the loaded bucket at a point on ed to automatically engage the rear and bottom wall of the bucket and scrape the contents outwardly through the open forward end of the bucket during the inverting operation, substantially as described.

4. The combination with an inclined bucket guiding and supporting track, a truck mounted to travel thereon, and a bucket carriedby said. truck, of a frame suspended from said track and having a substantially horizontal track-way communicating with said main guiding and supporting track ada ted to receive and guide the forward whee s of the truck, anoierating cable connected to the rear end 0; the bucket, whereby said bucket is inverted at the end of its travel,

and a scraper mounted on said suspended frame adapted toautom'atically engage the rear andbottom wall of the bucket and scrape over the latter toward its front or cutting edge, substanti'ally as described.

5. The I combination with an inclined. bucket guiding and supporting track, a truck mounted to travel thereon, and a bucket car ried by said truck, of a frame suspended from said track, said frame having substantially horizontal and vertical track-ways commuing track adapted to receive and guide the forward wheels of the truck, an operating cable connected to the rear end of the bucket, I whereby said bucket is inverted at thejend of pended frame across the vertical track-ways thereof, the operating edge of said scraper being so located as to automatically engage the upper end of the rear wall of the bucket and scrape over the latter toward the front or cutting edge, substantially as described.

' CHARLES C. JACOBS. Witnesses:

SAMUEL N. Pom), L. F. MOGREA.

- n s n s v n nicating wlth said mam guiding and support- 9 5 3 its travel, and a scraper mounted on said sus- TOO 

